Apparatus for applying an axial force to well pipe slips
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United States of America Patent
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Nov 5, 2013
Grant Date -
Jun 28, 2012
app pub date -
Dec 23, 2010
filing date -
Dec 23, 2010
priority date (Note) -
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Abstract
An apparatus for gripping a string of well pipe being lowered into or retrieved from a well includes pipe slips defining a central bore opening having an axis. The pipe slips are configured to abut and grip a surface of a pipe passing through the central bore opening while the pipe slips are in a first position. The pipe slips are further configured to allow axial movement of the pipe when moved to a second position. The apparatus includes at least one hydraulic ram device configured to exert an axial force on the pipe slips while the pipe slips are in the first position to enhance gripping of the pipe.
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